The kernel.h hosts a couple of macros and constants that may have been put
to a better place. Do that. Also add missing documentation.
No functional changes intended.

Andy Shevchenko (1):
  kernel.h: Move PTR_IF() and u64_to_user_ptr() to util_macros.h

Ingo Molnar (1):
  kernel.h: Move READ/WRITE definitions to <linux/types.h>

 include/linux/kernel.h      | 14 +-------
 include/linux/types.h       |  4 +++
 include/linux/util_macros.h | 66 +++++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 13 deletions(-)

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2.47.2